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At a certain time a particle had a speed of 18m/s in thepositive direction, and 2.4 seconds later its speed was 30 m/s inthe opposite direction.
(a) What is the average acceleration of the particle during this 2.4 second interval?
(b) What is the total distance traveled during the same2.4 second time interval?
A plastic bag is filled with hydrogen at atmospheric pressure and 23.0 oC. what is the required volume of the balloon if the air inside can be maintained at 43.0 oC
A puck rests on a horizontal frictionless plane. A string is wound around the puck and pulled on with constant force. What fraction of the disk's total kinetic energy is due to the rotation?
An electron gun in an old television picture tube is a device that uses an electric field to accelerate electrons. What magnitude of electric field is needed to accelerate an electron from rest to a speed of 4.0x10^7 m/s in a distance of .01m.
question1as thermonuclear fusion proceeds in its core the sun loses mass at a rate of 3.64 109 kgs. for the duration of
What is the speed of the river current. What is the swimmer's speed relative to the shore.
A diver can change his rotational inertia by drawing his arms andl egs close to his body in the tuck position. After he leaves the diving board in the straight position (with some unknown angularvelocity), he pulls himself into a ball as closely a..
A tourist takes a picture of a mountain 14 km away using a camera that has a lens with a focal length of 50 mm, What is the ratio of the height of the mountain's image on the camera's image
a rock is tossed off the top of a cliff of height 34.5m. its initial speed is 29.1m/s and the launch angle is 30.2degrees with respect to the horizontal. what is the speed with which the rock hits the ground
A dish of hot food has an emissivity of 0.40 and emits 20 W of thermal radiation. If you wrap it in aluminium foil, which has an emissivity of 0.008, how much power would it radiate.
A criminal is escaping across a rooftop and runs off the roof horizontally at a speed of 5.6 m/s,hoping to land on the roof of an adjacent building. Air resistanceis negligible. The horizontal distance between the two buildings isD, and the roof of t..
You apply a potential difference of 4.50 V between the ends of a wire that is 2.50 m in length and 0.654 mm in radius. What is the resistivity of the wire
When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver, What are the magnitude and direction of his acceleration
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